/*
 * Copyright (C) the libgit2 contributors. All rights reserved.
 *
 * This file is part of libgit2, distributed under the GNU GPL v2 with
 * a Linking Exception. For full terms see the included COPYING file.
 */
#include "common.h"
#include "w32_buffer.h"
#include "../buffer.h"
#include "utf-conv.h"
GIT_INLINE(int) handle_wc_error(void)
{
        if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
                errno = ENAMETOOLONG;
        else
                errno = EINVAL;
        return -1;
}
int git_buf_put_w(git_buf *buf, const wchar_t *string_w, size_t len_w)
{
        int utf8_len, utf8_write_len;
        size_t new_size;
        if (!len_w)
                return 0;
        assert(string_w);
        /* Measure the string necessary for conversion */
        if ((utf8_len = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, string_w, len_w, NULL, 0, NULL, NULL)) == 0)
                return 0;
        assert(utf8_len > 0);
        GITERR_CHECK_ALLOC_ADD(&new_size, buf->size, (size_t)utf8_len);
        GITERR_CHECK_ALLOC_ADD(&new_size, new_size, 1);
        if (git_buf_grow(buf, new_size) < 0)
                return -1;
        if ((utf8_write_len = WideCharToMultiByte(
                        CP_UTF8, WC_ERR_INVALID_CHARS, string_w, len_w, &buf->ptr[buf->size], utf8_len, NULL, NULL)) == 0)
                return handle_wc_error();
        assert(utf8_write_len == utf8_len);
        buf->size += utf8_write_len;
        buf->ptr[buf->size] = '\0';
        return 0;
}